CVE-2022-49555 Details
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_qca: Use del_timer_sync() before freeing While looking at a crash report on a timer list being corrupted, which usually happens when a timer is freed while still active. This is commonly triggered by code calling del_timer() instead of del_timer_sync() just before freeing. One possible culprit is the hci_qca driver, which does exactly that. Eric mentioned that wake_retrans_timer could be rearmed via the work queue, so also move the destruction of the work queue before del_timer_sync().
A vulnerability has been identified in the Linux kernel's Bluetooth subsystem, specifically within the hci_qca driver. This issue arises from improper timer management, where a timer can be freed while still active, leading to corruption of the timer list. The problem occurs because the del_timer() function is used instead of del_timer_sync(), creating a risk of freeing a timer that has not been properly deactivated. The vulnerability has been addressed by ensuring that del_timer_sync() is used before freeing the timer, and by rearranging the destruction of the associated work queue to prevent rearming of the timer via the workqueue.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/2717654ae022e6ea959a4b7b762702fe1a4690c2 | kernel.org | Patch |
| https://git.kernel.org/stable/c/37d17f63d085d601011964ade7371aeebeb6ed4b | kernel.org | Patch |
| https://git.kernel.org/stable/c/4989bb03342941f2b730b37dfa38bce27b543661 | kernel.org | Patch |
| https://git.kernel.org/stable/c/72ef98445aca568a81c2da050532500a8345ad3a | kernel.org | Patch |
| https://git.kernel.org/stable/c/db03727b4bbbbb36e6ef4cb655c670eefb6448e9 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.3, < 5.10.120 >= 5.11, < 5.15.45 >= 5.16, < 5.17.13 >= 5.18, < 5.18.2 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 4, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | kernel.org |
| Oct 22, 2025 | Initial Analysis | [email protected] |
| Feb 26, 2025 | New CVE Received | kernel.org |